The Quick Pitch System used with the Pre-Pitch permits easy construction of traditional mortar bed shower floors with the proper minimum water drainage slope of 1/4" per 12" run. With this time saving method available at Dix Systems there is now no chance for an error in measurement, or the need for a level, to achieve a properly sloped shower floor. These products are included on the OneLiner Kits as well as PVC Kits and RedGard Kits. In our kits we use the Oatey brand for round drain grate and EBBE brand for the square grate option the riser on each of these models 1 1/2" both work great with the quick pitch center rings. If you choose your own check the thread length of riser make sure it will work.